/**
 * Copyright 2000 self.com.au
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License. (http://www.apache.org/licenses/LICENSE-2.0)
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed 
 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for 
 * the specific language governing permissions and limitations under the License.
 *
 * <dhamma-message src="Atisha (11th century Tibetan Buddhist master)">
 * 	The greatest achievement is selflessness. The greatest worth is self-mastery.
 * 	The greatest quality is seeking to serve others. The greatest precept is continual awareness.
 * 	The greatest medicine is the emptiness of everything. The greatest action is not conforming with the worlds ways.
 * 	The greatest magic is transmuting the passions. The greatest generosity is non-attachment.
 * 	The greatest goodness is a peaceful mind. The greatest patience is humility.
 * 	The greatest effort is not concerned with results. The greatest meditation is a mind that lets go.
 * 	The greatest wisdom is seeing through appearances. 
 * </dhamma-message>
 *
 * @author Ashin Wimalajeewa
 */
package self.amigo.editor.layer;

import java.awt.*;

import self.gee.*;

final public class GridLayer implements ILayer  {
  final static private Color color = new Color(180, 180, 180); //Color.gray;
//  final static private Color bgColor = Color.lightGray;
//  final static private Color bgColor = new Color( 198, 203, 210 );
  final static private Color bgColor = new Color( 191, 196, 207 );
  
  final static private int   spacing = 16;
  final static private int   dotSize = 2;
  
  private IDiagram picture;
  
  private boolean visible = true;
  
  public void paint( Graphics surface ) {
    paintDots( surface, true );
    paintBorder( surface );
  }

  public void clear() {
	// nothing to do.
  }
  
  public boolean isVisible() {
    return visible;
  }
  
  public void    setVisible( boolean show ) {
    visible = show;
  }
  
  public void setDiagram( IDiagram diag ) {
    picture = diag;
  }
  
  private void paintDots(Graphics g, boolean paintBackground) {
    Rectangle clip = g.getClipBounds();
    if (paintBackground) {
      g.setColor(bgColor);
      g.fillRect(clip.x, clip.y, clip.width, clip.height);
    }
    int x = clip.x / spacing * spacing - spacing;
    int y = clip.y / spacing * spacing - spacing;
    int right = clip.x + clip.width;
    int bot = clip.y + clip.height;

    g.setColor(color);
    while (x <= right) {
      y = 0;
      while (y <= bot) {
	g.fillRect(x, y, dotSize, dotSize);
	y += spacing;
      }
      x += spacing;
    }
  }
  
  private void paintBorder( Graphics g ) {
    if ( picture == null )
      return;
      
    g.setColor( color );
    g.drawRect( 0, 0, picture.getWidth(), picture.getHeight() );
  }
}